Wick type oil burner control



Nov. 21, 1944. H. c.' SHAGALOFF 3 2,363,443

WICK TYPE OIL BURNER CONTROL Filed 11a '15, 1941 s Sheets-Sheet 1 '1' a a 0 BY 7 Nov. 21, 1944." H. c; SHAGALOFF NICK TYPE OIL BURNER CONTROL Filed May 15, 1941 3 Sheets-Sheet 3 H H; v 8?? dial 0 -3; and

Patented Nov. 21, 1944 2,363,448 1 W101: TYPE on. BURNER CONTROL Harry 0. Shagalofl', Evansville, Ind., assignor to Servel, Inc., New York, N. Y., a corporation of Delaware Application May 15, 1941, Serial Naasass'z I Claims.- (01. 158-94) This invention relates to a wick type oil burner,

and more particularly to an improved wick type burner structure which aflords better adjustment and control of the burner flame.

That which is new in the subject burner, and which constitutes the invention, is a new operative relationship of parts. An annular wick holder contains a, cylindrical wick and is provided with a known turner for moving. the wick up or down in the holder to adjust'the exposure of the wick at the upper edge of the holder.- The holder and its wick and the' turner comprise an assembly located in and movable up and down in an annular space between an inner chimney and an outer chimney. These chimneys are provided with perforations to supply air to a combustion zone in the upper part of the annular space between the chimneys. Thermostatically operated mechanism is provided to move the wick and holder assembly up and down relative to the chimneys to regulate the heat of the burner flame.

- The burner structure is explained in detail in the following description which should be considered in connection with the accompanying drawings of which:

Fig. l is a perspective view of a burner embodying the invention, portions being cut away to better show-the details of construction;

Fig. 2 is a sectional view on line. 22 of Fig.

Fig. 3 is a sectional view on line 3'3 of Fig. 2. Referring to Fig. 1 of the drawings, a burner 22 is provided with aframe structure formed by: a casting I56, indicated at right center; a base plate I58 which is mounted on the casting I56 and which is provided with a rim I68; an upper the cylindrical part I86 and is secured to the cone I84. The sleeve I98 is turned inward over flange I88 and has a row of holes I92. An imperforate inverted funnel I94 is seated on the edge of the perforated cone I84 and surrounds thelatter. The funnel I94 has a ledge or rim I96 (see Fig. 2) which projects downward and inward. The flange I68 is cut away at correflanged ring I62; and a cylindrical perforated' cover I64 mounted betweenthe rim I68 and the upper ring I62. The perforated cylinder I64 forms the lower portion of a stationary outer chimney assembly II! to be further described. As best seen in Fig. 3, the cover I64 has end portions I65 which are joined to the two sides of the casting I56. The base plate I58 has a. ceniral disc portion, I66 connected to the outer portion of the base plate byfour radial strips I18.

I88; The cone I84 has a cylindrical chimney portion I86, the upper end of which has an outward flange I83. An air directing sleeve I88 surrounds spending places to permit the tunnel I94 to be moved downward without the tangs I98 striking the flange. The rim I82 is cut away at an angle to form a cam portion, not shown, adjacent each cut away portion. When the funnel I94 is to be placed on flange I88, it is first seated and then rotated clockwise so that each of the tangs I98 engages a corresponding cam portion of rim I82 to'hold both the cone I84 and inverted funnel I98 in place. A flue supporting sleeve 288 (also see Fig. 1) having three outwardly projecting pins 282 is secured to the base of the inverted funnel I94. The pins 282 project through inclined slots in a flue bracket 284' (Fig. 2) which has a. flange Ior'supportin ga flue- I I8. A handle 286 is provided to turn the flue bracket to raise and lower the flue, this action being due to the inclination of the slots with respect to the pins engaged therein.

An inner chimney H4 is located concentrically within the outer chimney assembly II2 (Fig. 1

As best seen in Fig. 2, the inner chimney 4 has.

four slots extending upward from its lower edge forming four legs I68. These legs project through the four holes III in the base plate I58 and are secured to the disc portion I66 of the'base plate. The top of the inner chimney H4 is fitted with a perforated cap II6.

A wickfassembly H8 is located between the outer chimney assembly H2 and the inner chimney H4. The wick assembly II8 comprises a holder formed by an inner sleeve I22 and an outer sleeve I24 between which is located a cylindrical wick I28. The wick sleeves I22 and I24 are formed with four slots which extend upward from the bottom edges of these sleeves. The sleeves are connected at the peripheries oi these slots by inverted U-shaped members I48.

The cylindrical wick I28 has four depending strips or tails, each of which projects downward through a corresponding opening in the lower part of the wick holder. The lower part of the sleeve I24 has a flange I28 at its upper edge, and the upper part. I26 of'this sleeve rests upon the flange I 28 through a pair of bracket clips I38.

As seen in Fig. 2, each clip I38 is riveted to the upper sleeve part I26 and has a horizontal portion I32 which rests on the flange'l28, and a downturned part I34. The flange I28 is cut away to form a cam portion I36, and when the brackets I30 are located over the narrowest parts of these cams, the sleeve part I26 may be moved downward into place and then turned clockwise to the position shown in Fig. 1, in which'the clips I30 engage the flange I28 and hold the upper sleeve part I26 on the lower sleeve part I24.

-The annular .wick holder which has just been describedjs provided with a turner for movin the wick vertically therein to adjust the exposure of the wick at the upper edge of the holder. The wick turner will now be described. A bracket I42 is riveted to the inner surface of the wick holder sleeve I24 (Fig. 3). The bracket mounts a guide or sleeve I43 (Fig. 2). The bracket I42 holds a pinion I44 which meshes with a rack I46 which projects downwards through the guide or sleeve I43. The sleeve holds the rack I46 in verticalalignment, and rotation of the pinion I42 moves the rack I46 up and down.

A U-shaped wick clamp I48 is secured to the upper end of the rack I46. The clamp I48 is of resilient material and at its ends is provided with barbed grips I50 for engaging the cylindrical wick I20. The pinion I44 (Fig. 2) has a stub shaft Il provided with an axial .slot at it outer end. A removable key I52 engages in the slot to turn the shaft I5I' and the pinion I44. The key I52 has a sleeve I54 provided with aflared' end to guide the key into engagement with the pinion shaft I5I. By turning the key I52, the pinion I44 is rotated to move the rack I46 up or down, and the wick I20, which is clamped to the rack I46, is likewise moved up or down. When not in use, the key I52 is disconnected from the pinion shaft I5I and dangles on a chain I55 (Fig.3).

The annular wick holder with its cylindrical wick and wick turner, as previously described, is vertically movable as a unit in the annular space between the inner chimney H4 and the outer chimney assembly I I2. Mechanism is provided for causing. this movement. This mechanism consists of means such as a spring to urge the wick unit upward, and a device for moving the unit downward against the action of such means.

The wick assembly'or unit is urged upward by a helical spring 220. spring is secured to the disc portion I66 of the base plate I 58. The upper end of the spring engages a spider 222 ha.ving four ends which pro-' J'ect through the slots in the inner flue H4 and bear upward against the inverted U-shaped mem-- bers I40 of the wick unit. The upper ends of the slots in the flue II4 act as stops to limit the upward movement of the spider 222 and the wick assembly unit. When the latter is pushed downward, the spider is likewise pushed downward and compresses the spring 220.

Referring to Fig. 2, soldered to the lower side of the base plate I58 and concentric therewith'is 2,sea,44a

cludes a bifurcated lever having arms 208 and a stem'portion 2I0. The ends of the arm portions 208 rest upon two brackets 204 (Fig. l) which are fastened to the opposite sides of the outer wick sleeve I24. The end of lever 2 I0 is turned downward and formed with a knife edge 2I2 which pivotally rests in a groove 2I4 in a frame structure arm 2 I 6. The latter is provided with a pair of posts 218 on opposite sides of thelever 2I0 to guide the latter in vertical alignment. When the lever 2 I0 is pressed downward, as by the thermostat to be described, it pivots about the knife edge 2 I2 and moves the wick assembly downward. The extent of downward movement is limited by contact of the brackets 204 with the base plate I58. Referring to Fig. 1, the casting I56 has a mounting plate 224 consisting of a main portion anda supporting bar portion 228. As best seen in Fig. 2, the bar portion 228 fits on the top of two ledges 230 projecting from the casting I56 at each end of the bar portion. Each of the ledges 230 has a post 232 which projects through corresponding holes in the bar portion 228, and is provided at the upper surface of the bar portion with a latching groove 234. Slidably mounted on thetop surface of thebar portion 228 is a latch member 236 (Fig. 3) which has at one end a tab 238, as shown in broken lines in Fig. 2. The latch 236 is held in place by a pair of pins 240 (Fig. 3) which project through an elongated slot 242 in the latch member and. into the bar portion 228.. The latch member 236 is Provided at each end with a keyhole slot 244, the large portion of which receives the end of the post 232, and the narrow end of which snugly fits the post at the latching groove 234 (Fig. 2) In assembly, the bar portion 228 is located with its two holes over the two posts 232, with the latch member 236 having the large portions of the latching slots opposite the holes. The bar is moved downward so that the posts enter the holes and the latch member is then slid by means of its tab 238 to the latched position shown in Fig. 3. The latch member 236 is of resilient material, and it i shaped with an upward bend at its center so that it tends to remain latched.

Referring again to Fig, 1, extending. outwardly from the top of mounting plate 224 is a pivot post 246, and at the bottom of the plate is a rigid post 250. Pivotally carried by Pivot post 6 is a c nnel lever 252 which hangs from a set screw 254 The bottom end of this a downward projecting sleeve I12. vThe latter has a flange at its top, edge which is covered by a ring I14. The latter, as shown in Figs. 1 and 3, is provided with integral supporting brackets I16. At the right of the burner there is an adjustable I56. The device for-moving the wick assembly downward against the action-of spring 220 inbracket I15 which has a slot I11 through which projects a screw I18 threadedinto the castin with the se't screw extending through a pair of ears 256 integral with the upper end of the channel lever. At the bottom, channel lever 252 carries an operating roller 258 and a stop bar 260 which are loosely mounted at their ends to rotate freely. Operating roller 258 is formed by a sleeve loosely carried by an axle pin. Mounted below roller 258 and bar 260, upon a post 262 which is integral with mounting plate 224, is a crank arm 264 which has a horizontal lever portion 266 and a vertical lever portion 268. Lever portion 268 extends between roller 258 and bar 260 and is loosely received therebetween so that it may be freely engaged, and lever portion 266 rests upon the top of stem portion 2I0 of lever 206. Directly over roller 258 and bar 260 is a coil spring 210 (which is broken away in Fig. 1) which has one end carried by a spring cap 212 the center of which rests against channel lever 252. Spring 210 is held in position in a manner best shown-in Fig. 3, there beingan integral bracket 214 extending outwardly from mounting plate 224 which carries an adjusting shaft 216. Adjusting shaft 216 is rotatable and is provided at its outer end with an adjusting knob 218 carries suitable indicia, as shown in Fig. '2. At the inner end of shaft 218 (Fig. 3) is a threaded portion 280; and this threaded portion receives an adjusting nut 282 against which the end of spring 210 rests. Parallel to shaft 218 and extending from mounting plate 224 is a horizontal,

integral ledge 28! and the edge 01' this ledge ex-. tends into a groove (not shown) in the side of,

nut 282. This ledge prevents rotation of the nut with the result that when shaft 218 is rotated,

hich' forming an annular wick holder, an.annularv wick in said holder, a turner'on said holder for the thread engagement moves the nut axiallyi I along the shaft. Inthis manner the turning of knob-218 changes the position of the end of spring 210 and consequently changes the pressure exerted by the spring against channellever 282.

Positioned to engage the side of channel lever 252 opposite spring 210, so as to oppose the ac-' tion of the spring,'is a bellows 284 which is rigidly mounted atthe end opposite the channel lever on a bracket .288 integral with-mounting plate 224.v For'purposes of mounting, the bellowsis provided with a stud extension 288 which extends through a hole in bracket 288 and receives a nut 288, and bracket 288 is tightly clamped between Various changes may be made within the scope of the invention as set forth in the following claims.

I claim:

. 1. In a wick type oil burner, an inner chimney and an outer chimney having an annular space v therebetween, concentric cylindrical. sleeves se-' cured togetherin spaced apart relation and moving the wick vertically therein to adjust the exposure-of the wicket the upper edge of the holder, said holder, wick, and turner forming a wick assembly located in and vertically movable as a unit in the annular space between said inner and outer-chimneys, said chimneys having perforated portions for supply of air to a combustion zone in the upper part of said annular space, and mechanism operable to move said as sembly up and down relative to said chimneys V to regulate the heat of the burner flame.

the base of the bellows and the: nut. Capillary tube I82 extends from the outer end of stud 288 andis supported byarlgid arm 288 which is mounted upon bracket 288; The hole in bracket 288- through which-stud 288 extends opening into it ahorizontal slot (see Fig.1) 1m, and when it is desirable to remove the bellows, nut

288 is removed and stud 288 is slipp l'ongitudinally out oi its hole. The. capillary tube may then be slipped outwardly through-slot 282.

2. In a wick type oil burner, an inner chimney and an outer chimney having an annular space therebetween, said chimneys having perforated portions for supply of air to a combustion zone in. the upper part of said annular space, concentric cylindrical sleeves secured together in spaced apart relation and forming an annular wick holder, an annular wick in said holder, a turner onsaid holder for moving the wick vertically,

therein to adlust the exposureof the wick at the upper edge of the holder, said holder, wick, andturner forming a wick assembly located in and vertically movable as a unit inthe annular space Channel lever 282 is provided with 'adownwardly extending'stop tab 284, and post 258 carries an adjustable stop plu 288 (shown inbroken lines in Fig. 3) which is held in adjusted position by means of a lock nut 288. When being installed stop pin 288 is adjusted to provide a proper limit for the swinging movement of the channel lever; After assembly, a cover box 888 (see Fig.2) is slipped in position with its edge 'being received in a rabbet (see Fig. 1) 802 along the periphery of mounting plate r24. Cover'box ilii'is held in place by a thumb screw 804 which is threaded into a hole in the end of post 250.

between said inner and outer chimneys, means located within said inner chimney operative to urge, said unit in one direction. and a. device operable to move said unit in the opposite direction against the action of said means and thereby regulate the heat of the burner flame.

3. In a wick type oil burner, an inner chimney and an outer chimney having an annular space In the gas pressurewithin bellows m f depends upon -.the temperature of thermostat bulb I48. temperature or thermostat bulb I08 increases, bellows 284 tends to expand, swinging channel lever 252 against the action of spring 2ll.-- Thisswings bell crank 284 and lifts vthe '(Fig. 2), the tension on spring 2181s increased I with the result that for a given temperature ofthe thermostat bulb, a. smaller flame will, be

maintained. With other conditions constant,

counterclockwise movement of adjusting knob 218 causes an increase'inthe flame. Suitable stops (not shown) are provided to'limit the rotation of atfiusting knob 218. o

This extherebetween, said chimneys having perforated portions for supply of airto a combustion zone in the upper part of said annular space, concentric cylindricalsleeves'secured together in spaced apart relation and forming an annular wick holder, an annular wick in said holder, a turner on said holder :tor moving the wick vertically therein to adJust the exposure of the wickat the upper edge of the holder, said holder, wick,

and turner forming a wick assembly located inand vertically movable as a unit in the annular space between said inner and outer chimneys, said outer chimney having an opening for access to said turner, said inner chimney having vertical slots in the lower part thereof, a spring within said inner chimney connected by projectionsthrough said slots to urge said unit upward, and

a member operable to move said unit downwardagainst the action of said spring to regulate the heat of the burner flame.-

,4. A wick type oil burner as set forth inv claim 1 in which said devic is thermostatically operated.

' 5. A wick type oil burner as set forth in claim 3 in which said member is a lever having a forked end connected to the outside of said holder at diametrically opposite points.

' HARRY c. SHAGALOFF. 

